Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8048188 | Air cleaner arrangements; serviceable filter cartridge; and, methods | Robert Widerski, Randall Allen Engelland, Thomas R. Olson, Richard Lawrence Suydam | 2011-11-01 |
| 7972405 | Air cleaner arrangements; serviceable filter elements; and, methods | Randall Allen Engelland, Thomas R. Olson, Jim C. Rothman, Richard Lawrence Suydam | 2011-07-05 |
| 7927396 | Evacuation value arrangements; pulse jet air cleaner systems using same; and, method | Thomas R. Olson, Fred H. Wahlquist | 2011-04-19 |